(*//
标题:获取其他进程中TreeView的文本
说明:Window2000+Delphi6调试通过
设计:Zswang
支持:wjhu111@21cn.com
日期:2004-03-26
//*)

function TreeNodeGetNext(mHandle: THandle; mTreeItem: HTreeItem): HTreeItem;
var
  vParentID: HTreeItem;
begin
  Result := nil;
  if (mHandle <> 0) and (mTreeItem <> nil) then begin
    Result := TreeView_GetChild(mHandle, mTreeItem);
    if Result = nil then
      Result := TreeView_GetNextSibling(mHandle, mTreeItem);
    vParentID := mTreeItem;
    while (Result = nil) and (vParentID <> nil) do begin
      vParentID := TreeView_GetParent(mHandle, vParentID);
      Result := TreeView_GetNextSibling(mHandle, vParentID);
    end;
  end;
end;  { TreeNodeGetNext }

function TreeNodeGetLevel(mHandle: THandle; mTreeItem: HTreeItem): Integer;
var
  vParentID: HTreeItem;
begin
  Result := -1;
  if (mHandle <> 0) and (mTreeItem <> nil) then begin
    vParentID := mTreeItem;
    repeat
      Inc(Result);
      vParentID := TreeView_GetParent(mHandle, vParentID);
    until vParentID = nil;
  end;
end; { TreeNodeGetLevel }

function GetTreeViewText(mHandle: THandle; mStrings: TStrings): Boolean;
var
  vItemCount: Integer;
  vBuffer: array[0..255] of Char;
  vProcessId: DWORD;
  vProcess: THandle;
  vPointer: Pointer;
  vNumberOfBytesRead: Cardinal;
  I: Integer;
  vItem: TTVItem;
  vTreeItem: HTreeItem;
begin
  Result := False;
  if not Assigned(mStrings) then Exit;
  GetWindowThreadProcessId(mHandle, @vProcessId);
  vProcess := OpenProcess(PROCESS_VM_OPERATION or PROCESS_VM_READ or
    PROCESS_VM_WRITE, False, vProcessId);
  vPointer := VirtualAllocEx(vProcess, nil, 4096, MEM_RESERVE or MEM_COMMIT,
    PAGE_READWRITE);
  mStrings.BeginUpdate;
  try
    mStrings.Clear;
    vItemCount := TreeView_GetCount(mHandle);
    vTreeItem := TreeView_GetRoot(mHandle);
    for I := 0 to vItemCount - 1 do begin
      with vItem do begin
        mask := TVIF_TEXT;
        cchTextMax := SizeOf(vBuffer);
        pszText := Pointer(Cardinal(vPointer) + SizeOf(vItem));
        hItem := vTreeItem;
      end;
      WriteProcessMemory(vProcess, vPointer, @vItem,
        SizeOf(vItem), vNumberOfBytesRead);
      SendMessage(mHandle, TVM_GETITEM, 0, lparam(vPointer));
      ReadProcessMemory(vProcess, Pointer(Cardinal(vPointer) + SizeOf(TLVItem)),
        @vBuffer[0], SizeOf(vBuffer), vNumberOfBytesRead);
      mStrings.Add(StringOfChar(#9, TreeNodeGetLevel(mHandle, vTreeItem)) + vBuffer);
      vTreeItem := TreeNodeGetNext(mHandle, vTreeItem);
    end;
  finally
    VirtualFreeEx(vProcess, vPointer, 0, MEM_RELEASE);
    CloseHandle(vProcess);
    mStrings.EndUpdate;
  end;
  Result := True;
end; { GetTreeViewText }

//Example
procedure TForm1.FormCreate(Sender: TObject);
begin
  RegisterHotKey(Handle, 1, MOD_WIN, VK_F2);
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
  UnRegisterHotKey(Handle, 1);
end;

procedure TForm1.WMHOTKEY(var Msg: TWMHOTKEY);
begin
  case Msg.HotKey of
    1:
      GetTreeViewText(
        WindowFromPoint(Point(Mouse.CursorPos.X, Mouse.CursorPos.Y)),
        MemoText.Lines);
  end;
end;